Engine cylinder



June 19, 1923. 1,459,039

s. M; VIALE:

ENGINE CYLINDER Filed Aug. v11 1921 www Patented .lum-19, 1923'.

I UNITED VSTATESPATENT FFHCE.l

SPIRITO MARIO VIALE, OE covENTRY, ENGLAND, AssIGNOR To- ARMSTRONG sID- DELE'Ir MOTORS LIMITED, or covENTRY, ENGLAND,

ENGINE CYLINDER.

To all whom t may concern.'

Be it known that I, SPIRITO MARIO VIALE, a subject of the King of Italy, residin at Coventry, in the county of` WVarwick, ngland, .have invented certain new and use- -ful Improvements in Engine Cylinders, of which the followin is a specification.A

This invention re ates to air cooledcylindersfor internal combustion engines, of the kind in which the cylinder head 'is separate l V together and this locking ring may be mounted upon the barrel and engaged with the thread thereon, and is then screwed up against the inner end of the head after the latter is screwed home on the barrel. j The abutting faces of the ring and lower end of the head are coned,.the apex of the cone' being downwards, that is, -it points away from the head, the object being to Vcause .30 the joint to tend to tighten up as expansion takes place when the cylinder heats up.

The preferred manner of carrying out the invention is illustrated in the accompanying drawing shewing a section of part of a cylinder with the head and locking ring in ition.

' The head A is of aluminium alloy, Aand may carry the valves (not shewn) 1n any` suitable known manner. dThis head screwsy 40 upon the end ofthe steel cylinder barrel B,

and the external thread provided thereon forl this purpose atB2 ma be of the buttress or any other suitable orm, but preferably is of the V type. shewn.

At B8 there may be a ap in lthe thread, and upon the portion be Ow the` gap indicated at B4 kscrews the locking ring C, which is preferablyof steel. Where this ring 1s adapted to abut the cylinder head, 'its contactmg face is coned as shewn v.at D, the d1- rection` of inclination being such that the apex of the. cone of which it forms a part points away from the cylinder head, that 1s, away from thel combustion chamber. The

thrusts.

' Application led August 11, 1921. Serial No. 491,331.

abutting face on the head A is also coned lto correspond with that on the locking ring.

The ring C is 'firstscrewed down upon the thread B4 and the head A is then, fitted 1n place'upon the thread B2; In some cases the head may be heated before ittingto the ing ring and constituting the -last of the y engaged threads B2 connecting the head and the cylinder, and by extension of the coned contact 'surfaces at D of the locking ring andthe head is such that the apex F2 of the former is nearer to the combustion` chamber (that is, the head) than the 'apex vF of the latter cone, both cones, as shewn,

having their apices pointing in the same dlrectlon.

By reason of this arrangement, as the 'wall of the head expands under heat, it

tends to increase the pressurebetween the ring and head and to tighteglgthe joint still further.

Preferably the ring C is wide so as to i form a cooling flange and lhasholes C tol receive a Spanner or the like. l

Thus a tight mechanical 'oint is obtained at all times. Y

What I claim as my invention and desire to secure lby Letters vPatent of the United States is 1. In an engine cylinder, the combination with the barrel having screw threads thereon, and a head screwed upon said barrel, of a locking ring screwed upon the said lbarrel and bearing against the inner end of the said head so as to exert a thrust thereon on expansion.

2. In an engine cylinder, the combination of a barrel member, a head member,

screwed upon said barrel member, a locking with one of the aforesaid members, thereby'to exert a. thrust upon the other member, and a coned face formed on said locking ring to engage a cooperating coned face formed on the member against-which it a cylinderI as claimed in claimr 2,

forming theA coned contacting faces of'the -loclvxng ring and of the member agalnst which it"thrusts, at such an angle that the apex of the cone formed by theirexten- .5 sion is further from the cylinder head than the apex of thecone formed by extension.

l of the contacting sides of the engaged screw thread most remote from them in the screwthreaded connection of the head `with the c incienso barrel, the apice's dfboth cones pointing in l@ the same direction. l In testimony whereof Ihavesigned my name to this specification in the presence of two subscnibin witnesses. v

' S IRITO MARIO VIALE.

Witnesses: .Y

D. SINARCEY, E. M. NICHOLSON, 

